Journal ArticleDOI
Appropriate boundary conditions for computational wind engineering models using the k-ϵ turbulence model
Peter Richards,R.P. Hoxey +1 more
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In this paper, velocity and turbulence profiles associated with the k-ϵ turbulence model are proposed which produce homogeneous conditions, and the cospectrum for the Reynolds stress exhibits a characteristics frequency n o ≈ u ∗ / z which is consistent with the suggested profile equations.About:
This article is published in Journal of Wind Engineering and Industrial Aerodynamics.The article was published on 1993-08-01. It has received 1044 citations till now. The article focuses on the topics: K-omega turbulence model & K-epsilon turbulence model.read more
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Dispersion modeling of LNG-Vapor on land – A CFD-Model evaluation study
TL;DR: In this article, the authors used the ANSYS Fluent for simulating experiments of the "LNG Safety Program Phase II" (LSP Phase II) to examine how to model for risk research the dispersion of LNG-vapor.
Journal ArticleDOI
Analysis and Modifications of Turbulence Models for Wind Turbine Wake Simulations in Atmospheric Boundary Layers
TL;DR: In this paper, the influence of different turbulence models on the results of CFD wind turbine simulations is investigated by comparing the results with publicly available experimental measurements of the flow field from the Sexbierum wind farm, and the results showed that the simulations using the k-e and k-ω turbulence models consistently overestimated the velocity in the wind turbine wakes.
Dissertation
Hygrothermal performance of ventilated wooden cladding
TL;DR: In this paper, the authors applied Reynolds-averaged Navier-Stokes (RANS) CFD to study wind-induced airflow in the narrow (23 mm) ventilated facade cavities of an isolated low-rise building.
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Nature-based Solution of Greenery Configuration Design by Comprehensive Benefit Evaluation of Microclimate Environment and Carbon Sequestration
TL;DR: In this paper , the effect of greenery configurations on comprehensive benefits of micro-climate environment and carbon sequestration was investigated, and the evaluation index of comprehensive benefits (B ec ) was constructed by the weight method of CRITIC.
Journal ArticleDOI
Numerical simulation of pollutant dispersion characteristics in a three-dimensional urban traffic system
TL;DR: In this article, a mathematical model was established to describe the fluid flow and CO propagation characteristics in a complex 3D traffic system, including a sunken bus stop area, traffic roundabout, viaducts, and tunnels.
References
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Journal ArticleDOI
The numerical computation of turbulent flows
Brian Launder,D. B. Spalding +1 more
TL;DR: In this paper, the authors present a review of the applicability and applicability of numerical predictions of turbulent flow, and advocate that computational economy, range of applicability, and physical realism are best served by turbulence models in which the magnitudes of two turbulence quantities, the turbulence kinetic energy k and its dissipation rate ϵ, are calculated from transport equations solved simultaneously with those governing the mean flow behaviour.
Characteristics of turbulence in a boundary layer with zero pressure gradient
TL;DR: In this article, the results of an experimental investigation of a turbulent boundary layer with zero pressure gradient are presented and the importance of the region near the wall and the inadequacy of the concept of local isotropy are demonstrated.
Neutrally stratified boundary-layer flow over roughness changes and topography
TL;DR: In this paper, a linear model for neutral surface-layer flow over complex terrain is presented, which makes it possible to make high-resolution computations for an arbitrary distribution of surface roughness and topography.
Journal ArticleDOI
A mixed spectral finite-difference model for neutrally stratified boundary-layer flow over roughness changes and topography
TL;DR: In this paper, a linear model for neutral surface-layer flow over complex terrain is presented, which combines the simplicity and computational efficiency of linear methods with flexibility for closure schemes of finite-difference methods.
Journal ArticleDOI
Simulation of Effect of Wind Barriers on Airflow
TL;DR: In this article, the authors developed a quantitative, theoretical simulation of airflow normal to narrow wind barriers of various porosities and, when possible, verify the results using experimental data, using finite difference methods having a combination of upwind and central difference schemes.